From Isa 40:13. Heb., Who hath measured the Spirit? Though measured may be rendered tried, proved, regulated. Compare the same citation in 1Co 2:16. This is the only passage in the Septuagint where ruach spirit is translated by νοῦς mind. Known (ἔγνω) may refer to God's γνῶσις knowledge and ways in Rom 11:33; counselor to His wisdom and judgments. No one has counseled with Him in forming His decisions.